Simplify fallback-handling for SVG_PAINTTYPE_URI_*

Simplify fallback-handling for SVG_PAINTTYPE_URI_*

De-duplicate some of the logic for determining a fallback for a
non-existant url(...). This also fixes the case where a SVGResources
object is available, but the fallback is "none".

BUG=415622
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182253

[fs, 2014-09-18 16:41:22]

fs@opera.com changed reviewers:
+ fmalita@chromium.org, pdr@chromium.org, schenney@chromium.org

[fs, 2014-09-18 17:08:47]

(The unified diff is the more readable one...)

[pdr., 2014-09-18 18:08:11]

On 2014/09/18 17:08:47, fs wrote:
> (The unified diff is the more readable one...)

LGTM

[pdr., 2014-09-18 18:08:15]

The CQ bit was checked by pdr@chromium.org

[commit-bot: I haz the power, 2014-09-18 18:09:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/577283003/1

[commit-bot: I haz the power, 2014-09-18 18:15:33]

Committed patchset #1 (id:1) as 182253